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CVE-2026-41421 - Vulnerability Analysis

HighCVSS: 8.8

Last Updated: April 24, 2026

SiYuan - Stored XSS & Remote Code Execution

Published: April 24, 2026Updated: April 24, 2026

Overview

SiYuan < 3.6.5 contains a stored XSS caused by rendering user-controlled notification messages as raw HTML in Electron renderer with insecure configurations, letting attackers achieve desktop code execution, exploit requires sending crafted notification messages.

Severity & Score

Severity: High

CVSS Score: 8.8

Impact

Attackers can execute arbitrary desktop code via Electron, leading to full system compromise on affected desktop builds.

Mitigation

Update to version 3.6.5 or later.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-grjj-6f6g-cq8q

Related Resources

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Details

CVE ID: CVE-2026-41421
Severity: High
CVSS Score: 8.8
Type: stored_xss
Status: new

CWE

CWE-78

CVSS Metrics

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H